<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>

		<el-card>
			<el-alert :closable="false" title="添加商品" type="info" center show-icon>
			</el-alert>

			<el-steps align-center :space="200" :active="activeIndex - 0" finish-status="success">
				<el-step title="基本信息"></el-step>
				<el-step title="商品参数"></el-step>
				<el-step title="商品属性"></el-step>
				<el-step title="商品图片"></el-step>
				<el-step title="商品类容"></el-step>
				<el-step title="完成"></el-step>
			</el-steps>
			<el-form label-position="top" :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
				<el-tabs @tab-click="tabClicked" :before-leave="beforeTabLeave" v-model="activeIndex"
					tab-position="left">
					<el-tab-pane name="0" label="基本信息">
						<el-form-item label="商品名称" prop="goods_name">
							<el-input v-model="addForm.goods_name"></el-input>
						</el-form-item>
						<el-form-item label="商品价格" prop="goods_price">
							<el-input v-model="addForm.goods_price" type="number"></el-input>
						</el-form-item>
						<el-form-item label="商品重量" prop="goods_weight">
							<el-input v-model="addForm.goods_weight"></el-input>
						</el-form-item>
						<el-form-item label="商品数量" prop="goods_number">
							<el-input v-model="addForm.goods_number"></el-input>
						</el-form-item>
						<el-form-item label="商品分类" prop="goods_cat">
							<el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps"
								@change="handleChange">
							</el-cascader>
						</el-form-item>

					</el-tab-pane>
					<el-tab-pane name="1" label="商品参数">
						<el-form-item :label="item.attr_name" v-for="(item,index) in manyTableData" :key="item.attr_id">
							<el-checkbox-group v-model="item.attr_vals">
								<el-checkbox :label="cb" v-for="(cb,index) in item.attr_vals" :key="index" border>
								</el-checkbox>
							</el-checkbox-group>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane name="2" label="商品属性">
						<el-form-item :label="item.attr_name" v-for="(item,index) in onlyTableData" :key="item.attr_id">
							<el-input v-model="item.attr_vals"></el-input>
						</el-form-item>
					</el-tab-pane>
					<el-tab-pane name="3" label="商品图片">
						<el-upload :on-success="handleSuccess" :headers="headerObj"
							action="http://47.95.204.103:8887/api/private/v1/upload" :on-preview="handlePreview"
							:on-remove="handleRemove" list-type="picture">
							<el-button size="small" type="primary">点击上传</el-button>
						</el-upload>
					</el-tab-pane>
					<el-tab-pane name="4" label="商品内容">
						<quill-editor v-model="addForm.goods_introduce"></quill-editor>
						<el-button class="btnAdd" type="primary" @click="add">添加商品</el-button>
					</el-tab-pane>
				</el-tabs>
			</el-form>
		</el-card>

		<el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
			<img class="previewImage" :src="previewPath">
		</el-dialog>
	</div>
</template>

<script>
	import _ from 'lodash'

	export default {
		data() {
			return {
				activeIndex: '0',
				addForm: {
					goods_name: '',
					goods_price: 1,
					goods_weight: 1,
					goods_number: 1,
					goods_cat: [],
					pics: [],
					goods_introduce: '',
					attrs: [],
					pics: [],
				},
				addFormRules: {
					goods_name: [{
						required: true,
						message: '请输入商品名称',
						trigger: 'blur'
					}, ],
					goods_price: [{
						required: true,
						message: '请输入商品价格',
						trigger: 'blur'
					}, ],
					goods_weight: [{
						required: true,
						message: '请输入商品重量',
						trigger: 'blur'
					}, ],
					goods_number: [{
						required: true,
						message: '请输入商品数量',
						trigger: 'blur'
					}, ],
					goods_cat: [{
						required: true,
						message: '请选择商品分类',
						trigger: 'blur'
					}]
				},
				cateList: [],
				cateProps: {
					expandTrigger: 'hover',
					label: 'cat_name',
					value: 'cat_id',
					children: 'children'
				},
				manyTableData: [],
				onlyTableData: [],
				headerObj: {
					Authorization: window.sessionStorage.getItem('token')
				},
				previewPath: '',
				previewVisible: false,
			}
		},

		created() {
			this.getCateList()
		},

		methods: {
			async getCateList() {
				const {
					data: res
				} = await this.$request.get('categories')
				if (res.meta.status !== 200) return this.$message.error("获取商品数据失败")
				this.cateList = res.data
			},

			handleChange() {
				if (this.addForm.goods_cat.length !== 3) {
					this.addForm.goods_cat = []
				}
			},

			beforeTabLeave(activeName, oldActiveName) {
				if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
					this.$message.error("请先选择商品分类")
					return false
				}
			},

			async tabClicked() {
				if (this.activeIndex === '1') {
					const {
						data: res
					} = await this.$request.get(`categories/${this.cateId}/attributes`, {
						params: {
							sel: 'many'
						}
					})
					if (res.meta.status !== 200) return this.$message.error("获取商品参数列表失败")

					res.data.forEach(item => {
						item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(",")
					})
					this.manyTableData = res.data
				} else if (this.activeIndex === '2') {
					const {
						data: res
					} = await this.$request.get(`categories/${this.cateId}/attributes`, {
						params: {
							sel: 'only'
						}
					})
					if (res.meta.status !== 200) return this.$message.error("获取商品参数列表失败")
					this.onlyTableData = res.data
				}
			},

			handlePreview(file) {
				this.previewPath = file.response.data.url
				this.previewVisible = true
			},

			handleRemove(file) {
				const filePath = file.response.data.tmp_path
				const i = this.addForm.pics.findIndex(x => x.pic === filePath)
				this.addForm.pics.splice(i, 1)
			},

			handleSuccess(response) {
				const picInfo = {
					pic: response.data.tmp_path
				}
				this.addForm.pics.push(picInfo)
			},

			add() {
				this.$refs.addFormRef.validate(async valid => {
					if (!valid) return this.$message.error("请填写必要的表单项")

					const form = _.cloneDeep(this.addForm)
					form.goods_cat = form.goods_cat.join(",")

					this.manyTableData.forEach(item => {
						const newInfo = {
							attr_id: item.attr_id,
							attr_value: item.attr_vals.join(",")
						}
						this.addForm.attrs.push(newInfo)
					})

					this.onlyTableData.forEach(item => {
						const newInfo = {
							attr_id: item.attr_id,
							attr_value: item.attr_vals
						}
						this.addForm.attrs.push(newInfo)
					})
					form.attrs = this.addForm.attrs

					const {
						data: res
					} = await this.$request.post('goods', form)
					
					if (res.meta.status !== 201) return this.$message.error('添加商品失败')

					this.$message.success('添加商品成功')
					this.$router.push('/goods')
				})
			},
		},

		computed: {
			cateId() {
				if (this.addForm.goods_cat.length === 3) {
					return this.addForm.goods_cat[2]
				}
				return null
			},
		},
	}
</script>

<style lang="less" scoped>
	.previewImage {
		width: 100%;
	}

	.btnAdd {
		margin-top: 15px;
	}
</style>
